The ROI Calculator measures return on investment by comparing the gain from an investment with what was put in. Enter the cost and the final value (or the gain), and the ROI Calculator returns the net gain, the ROI as a percentage, and an annualized ROI when a holding period is supplied so short and long investments can be compared on the same yearly basis.
ROI answers how much was earned relative to capital at risk. A raw percentage ignores time; annualized ROI folds the holding period into the rate so a 50% gain in one year and a 50% gain in five years are not treated as equal performance.
*These results are estimates for information only, not financial or investment advice.*
Calculate your return on investment
The ROI Calculator computes return on investment as the net gain divided by the cost of the investment, expressed as a percent. ROI states how much was earned (or lost) for each dollar put at risk, without yet adjusting for how long the money was invested.
The formula is ROI = (gain from investment - cost of investment) / cost of investment x 100. When the final value is entered instead of gain, gain = final value - cost. Cost of $1,000 that grows to a final value of $1,500 produces a gain of $500 and an ROI of 50%. A final value below cost produces a negative ROI, which the ROI Calculator reports as a signed percentage.
The ROI Calculator shows the dollar gain beside the percentage so a 50% result is never confused with a $50 gain on a different principal.
Calculate the annualized ROI
The ROI Calculator calculates annualized ROI by converting the total return into an equivalent yearly compound rate over the holding period. Annualized ROI answers what constant yearly rate would have produced the same total return in that many years of compounding.
The formula is annualized ROI = ((1 + ROI)^(1/years) - 1) x 100, where ROI is the decimal total return. On a 50% total ROI over 3 years: 1 + 0.50 = 1.50; 1.50 raised to 1/3 is about 1.1447; subtract 1 and multiply by 100 to get about 14.5% per year. The same 50% over 1 year annualizes to 50%, which shows why time must enter the comparison.
Without annualizing, a multi-year gain looks as strong as a one-year gain of the same size. The ROI Calculator surfaces both figures so the total outcome and the yearly pace stay distinct.
Compare investments with ROI
The ROI Calculator compares investments fairly when annualized ROI is used across different holding periods. Total ROI alone ranks a longer investment higher whenever the absolute gain is larger, even if the yearly pace of return on capital was slower.
Two examples on the same $1,000 cost illustrate the point. Investment A ends at $1,500 after 3 years: total ROI 50%, annualized about 14.5%. Investment B ends at $1,200 after 1 year: total ROI 20%, annualized 20%. On total ROI alone, A looks better; on annualized ROI, B ran at a faster yearly pace. Which matters depends on the decision: total wealth created versus rate of return per year.
The ROI Calculator does not adjust for risk, fees, taxes, or cash flows mid-period. Those factors can reverse a ranking that looks clear on headline ROI alone. For doubling-time estimates at a given rate, the Rule of 72 Calculator on QuickCalculators is the complementary shortcut.
A third comparison case: $2,000 invested grows to $2,800 in 4 years. Total gain is $800, total ROI is 40%, and annualized ROI = ((1.40)^(1/4) - 1) x 100 ~= 8.8%. That yearly pace sits below the 14.5% annualized pace of the $1,000-to-$1,500 path over 3 years, even though both show healthy total gains. The ROI Calculator's annualized output is what makes that ranking fair.
Account for what the cost and final value include
The ROI Calculator treats cost and final value as complete economic inputs for the period measured. If purchase commissions were paid, include them in cost. If sale commissions or exit fees reduce proceeds, use the net final value. Omitting friction inflates ROI.
Dividends or distributions received during the hold belong in the gain if the question is total return. A share bought at $1,000, sold at $1,400, with $100 of dividends along the way, supports a $500 gain and a 50% ROI on cost when those cash receipts are counted. The ROI Calculator does not scrape brokerage histories; it uses the totals entered. State whether the figures are total-return inclusive so two analysts do not compare a price-only ROI with a total-return ROI by accident.
Taxes are usually applied after the pre-tax ROI is known. After-tax ROI needs the tax rate on the gain type involved. Enter after-tax proceeds only when that is the decision metric.
Frequently asked questions
How is ROI calculated?
ROI is calculated as (gain - cost) / cost x 100. The ROI Calculator also accepts final value and derives gain as final value minus cost. A $1,000 cost that becomes $1,500 has a 50% ROI.
What is annualized ROI?
Annualized ROI is the equivalent yearly compound rate over the holding period. The ROI Calculator computes ((1 + ROI)^(1/years) - 1) x 100. A 50% total return over 3 years annualizes to about 14.5%.
Why annualize ROI when comparing investments?
Annualizing ROI puts investments of different lengths on a yearly basis. The ROI Calculator reports both total and annualized figures so a multi-year gain is not ranked as if it happened in one year.
Can ROI be negative?
ROI is negative when the final value is below cost. The ROI Calculator still returns the signed percentage so a loss is visible.
Does ROI include fees and taxes?
Basic ROI uses the cost and final value entered. Fees, taxes, and mid-period cash flows are included only if they are already reflected in those inputs. The ROI Calculator does not invent tax or fee adjustments.
How does ROI relate to the Rule of 72?
ROI measures return already earned or projected. The Rule of 72 estimates how long money takes to double at a stated rate. The ROI Calculator and Rule of 72 Calculator answer related but different questions on QuickCalculators.
Is ROI the same as CAGR?
Annualized ROI over a multi-year hold is closely related to CAGR when the inputs are beginning value, ending value, and years. The ROI Calculator emphasizes the total ROI plus the annualized conversion. CAGR naming is common in investment reporting for the same yearly compound idea.
What if money was added mid-way through the hold?
Simple ROI on a single cost and final value assumes one capital commitment. Additional deposits need a timed return method (such as a personal rate of return) for precision. The ROI Calculator's basic mode is best when cost is a single outlay or when mid-period flows are already netted into the inputs carefully.
Summary
The ROI Calculator divides net gain by cost to find return on investment, so $1,000 growing to $1,500 is a $500 gain and a 50% ROI.
Annualized ROI converts that total into a yearly compound rate with ((1 + ROI)^(1/years) - 1) x 100, about 14.5% over three years for the same example, or about 8.8% for a 40% gain over four years.
Comparing investments of different lengths needs the annualized figure; total ROI alone treats unequal holding periods as if they were the same. Include fees and distributions in cost and final value when they belong to the decision. These results are estimates for information only, not investment advice.